Land-dredging pipe and process of manufacture thereof



April 10, 1928.

1,665,591 J. J. KANE LAND DREDGING PIPE AND PROCESS OF MANUFACTURE THEREOF Filed Feb. 10, 192? 2 Sheets/Sheet l i i L;

7 Inventor cfmepivc/T 1%2776,

April 10, 1928. 1,665,591

J. J. KAN E LAND DREDGING PIPE AND PROCESS OF MANUFACTURE THEREOF Fiied.Feb.10, 1927 2 Sheets-Sheet, 2

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Attornqy Patented Apr. 10,1928.

1,665,591 PATENT emcee.

' JOSEPH J. KANEQO F GALVESTON, TEXAS, ASSIGNOR TO KANE BOILER WORKS, OF

i GALVESTON, TEXAS.

LAN D-DREDGING PIPE AND PROCESS OF MANUFACTURE THEREOF.

application filed February 10, 1927 Serial No. 167,306.

The present invention relates to an improved land dredging pipe, andthe process of manufacture thereof.

An important object of the invention resides in theprovision of pipe of this nature which has agradual taper from one end to the other and the smaller end of which has a pronounced taper and has opposed thickened wall portions tocompensate for the wear to which these portions are subjected in use.

Another important object of the'invention lies in the provision of a pipe of this nature which is formed from a single sheet of metal.

A still further important object of the invention resides in the provision of a pipe of this nature whichis simple in its construction, strong and durable, inexpensive to manufacture, thoroughly efficient and reliable in use, easy to couple and uncouple, and otherwise well adapted to the purpose for which it is designed.

Another important object of the invention lies in the process of manufacture of the pipe wherein the smaller end is heated at opposite portions so that said smaller end may be pressed by dies to have a more pronounced taper and will have opposite thickened wall portions.

lVith the above and numerous other objects in view as will appear as the description proceeds, the invention resides in cer-' tain novel details of construction and novel steps of manufacture as will be hereinafter more fully described and claimed.

. In the drawing Figure 1 is a sectional elevation of a tapered pipe section formed from sheet metal, Figure 2 is a plan view of the sheet from which the pipe section shown in Figure 1 is formed,

Figure 3 is a sectional view showing the a smaller end of the tapered pipe section placed between a pair of female dies,

Figure 4: is a similar view showing the dies brought together,

Figure 5 is an end elevation of the structure shown in Figure 3,

Figure 6 is" an elevation of the finished pipe,

Figure 7 1s a transverse section therethrough taken substantially on the line 77 of Figure 6.

Referring to the drawing in detail, it will be seen that the numeral 5 denotes a sheet of metal from which the pipe is to be formed.

This sheet of metal is cut diagonally along its longitudinal edges toproduce a substantially trapezoidal formation and is curved to the tapered tubular formation and. welded throughout its length as shown in Figure 6 in any suitable manner-such as by the process disclosed in my co-pending application filed. of even date. I provide a pair of female dies 7 and 8 which may be mounted in a hydraulic or other suitable press structure so that they may be moved towards each other. These'dies 7 -and 8 are provided with coinplementary semi-cylindrical recesses 9 thatare opposed to each other. Liners 10 have a semi-cylindrical outer surface and a semifrusto-conical inner surface. The smaller endfof the tubular section 6' is heated at those portions confined between dotted lines 10 and llshown in Figure 5 and the other a i portions including the welded seam portions are cold. The smaller end is then placed between the dies 7 and 8 with the seam to. one side and the dies are pressed towards each other so that the heated portions between lines 10 and 11 are compressed and become thicker as is clearly illustrated in Figure 7 and the smaller end is formed with a more pronounced taper as is clearly illustrated at 6 in Figure 6. These thickened opposed portions of the end 6 are denoted by numerals 12 a, and are very important as I will be brought out'later.

With a plurality of pipe sections constructed in accordance with this invention it will be seen that the smaller end of one pipe section may be insertedin the larger end of another pipe section. These pipe sections are laid with their seams to the side as the greatest wear on these land dredging pipes is at the bottom and particularly at the inner V telescoped end at the bottom thereof. The thickened portions 12, of course, resist this wear and cause the pipeto last a comparatively longer length of time in actual use. Obviously,- these pipes will be turned around from time to time so as .to dist-ributethe wear on both the thickened"portions 12; It will also be seen that these pipes are capable of being quickly and easily coupled and urn coupled and may be manufactured at a comparatively low cost. a

The utility and advantages of this device and the process for manufacturing the same will be clearly. understood, it is thought, by those skilled in this art without a more dein the details of construction and in the steps of the process may he resortedto with out departing from thespirit or scope :01" the invention as hereinafter claimedor' sacrificing any of its advantages.

Having thus described my invention, hat I claim as new is a 1. As a new article of manufacture, a pipe comprising an elongated tubular tapered 'stnucture having one end smaller than the other, the'smaller end havinga more pronounced taper than the remaining portions of the pipe, said smaller end being formed with opposed Wall sections thicker than the remaining Wall sections. i a

2 As a new article of manufacture, a pipe formed from a single sheet of material bent to form an elongatedtubular tapered body the smaller end of Which has a more pronounced taper and having a pair of opposed Wall sections thicker than the remaining portions thereof.

A pr ces o ma ufacturing.pipe se itions consistlng in placing the smaller end centers of the dies and moving the dies to Wards each other to increase the taper of said smaller end and thicken theheated poi"- tions thereof. a

4. A process of manufacturing pipe from a tapered tubular member formed from a single sheet of material consisting of heating a. pair of opposed portions of the smaller ends of the tubular member a distance from the seam thereof and placing said smaller end in a pair of dies having conoayesemi frusto-conical recesses and pressing said smaller end so as to provide it with aanore pronounced taper than the remaining portion of the tubular member and to thicken said heated portions. y

In testimony whereoflafiix my signature.

JOSEPH J; KANE, 

